MMET 301 Exam 2 Questions With Correct Answers

MMET 301 Exam 2 Questions With
Correct Answers

Worm gears are used for: - CORRECT ANSWER✔✔-- speed reduction
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- takes 100 times for the worm to turn to make it around the gear one
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time
- automation type areas
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More threads on a worm gear, - CORRECT ANSWER✔✔-the quicker it
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moves


Internal Bevel Gear - CORRECT ANSWER✔✔-the pitch cone angle is
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greater than 90 degrees
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Crown Gear - CORRECT ANSWER✔✔-the pitch cone angle of gear is 90
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degrees, or less, form the shaft
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Miter Gears - CORRECT ANSWER✔✔-pinion and bevel gear are the
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same size, so gear ratio is one to one
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Backlash for gears - CORRECT ANSWER✔✔-- gap between the teeth
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, - provides clearance for proper lubricant penetration and prevents
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binding


Too much backlash causes - CORRECT ANSWER✔✔-teeth to wear out
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and not intersect in the most convenient way
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Non-ferrous metals - CORRECT ANSWER✔✔-- contain carbon, so
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harder/stronger
- carbon can rust and get weak though
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What type of materials are more expensive? - CORRECT ANSWER✔✔-
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non-carbon


Material selection is based on application requirements like: - CORRECT
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ANSWER✔✔-- design loads | |




- speed
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- service conditions
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- cost
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Ferrous metals - CORRECT ANSWER✔✔-- carbon
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- steel
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- alloys of steel
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